53489280 has 128 divisors (see below), whose sum is σ = 183697920. Its totient is φ = 13160448.

The previous prime is 53489279. The next prime is 53489287. The reversal of 53489280 is 8298435.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×53489280² = 5722206149836800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (53489287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23889 + ... + 26031.

It is an arithmetic number, because the mean of its divisors is an integer number (1435140).

Almost surely, 2^53489280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91848960).

53489280 is an abundant number, since it is smaller than the sum of its proper divisors (130208640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53489280 is a wasteful number, since it uses less digits than its factorization.

53489280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 53489280 is about 7313.6365783378. The cubic root of 53489280 is about 376.7809331276.

The spelling of 53489280 in words is "fifty-three million, four hundred eighty-nine thousand, two hundred eighty".